Fix deprecation warnings in CI

Author: TebbeUbben

.github/workflows/main.yml

@@ -20,10 +20,10 @@ jobs:
         smalltalk: [ Squeak64-6.0 ]
     name: ${{ matrix.smalltalk }} on ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: hpi-swa/setup-smalltalkCI@v1
         with:
-          smalltalk-version: ${{ matrix.smalltalk }}
+          smalltalk-image: ${{ matrix.smalltalk }}
       - run: smalltalkci -s ${{ matrix.smalltalk }}
         timeout-minutes: 30
         env: